Chapter 15 The Atmosphere

What percentage of the atmosphere is composed of oxygen?

• 12 percent

• 21 percent

• 58 percent

• 78 percent

A ratio that compares the amount of water vapor the air contains to the maximum amount that the air could hold at that temperature is _________.

• temperature inversion

• radiation

• relative humidity

• convection

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The lowest layer of Earth's atmosphere, the one directly above the ground, is called the _________.

• troposphere

• stratosphere

• thermosphere

• mesosphere

What is the source of the energy that drives air movement in the troposphere and influences weather and climate?

• ocean

• volcanoes

• ozone layer

• sun

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Carbon-containing fuels, or fossil fuels, formed millions of years ago from the remains of __________.

• gases in the atmosphere

• chlorofluorocarbons

• living organisms

• volcanic eruptions

How does carbon monoxide affect human health?

• It interferes with the body's ability to deliver oxygen

• It irritates the throat and air passages

• It helps the respiratory system function more efficiently

• It depletes ozone, causing greater exposure to the sun's rays.

A(n) _____ can trap smog close to the surface. It happens when a layer of cool, dense air stays near the ground and under a layer of warm air.

• temperature inversion

• acid deposition

• air mass

• convection current

Pollutants are removed or changed chemically before they leave factory smokestacks by a(n) _______.

• chlorofluorocarbon

• scrubber

• inversion

• catalytic converter

Tags

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In general, warm air can hold less water vapor than cooler air.

• True

• False

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a substance that is released into the atmosphere, the cause of air pollution.

• Energy
• emission
• ozone layer
• smog